Five component microscope eyepiece

ABSTRACT

This invention relates to a microscope eyepiece having a magnification of substantially 10X, an apparent field of view of substantially 52.3*, and a maximum exit pupil diameter of substantially 1.60 millimeters.

an "vi V OR 398T9018 United State Shoemaker [54] FIVE COMPONENT MICROSCOPE EYEPIECE [75| Inventor: Arthur H. Shoemaker, East Aurora,

I73| Assigncc: American Optical Corporation,

Southhridge. Mass.

[22] Filed: Feb. 4, 1974 [2]] Appl. No.: 438,974

Related US. Application Data [63] Continuation of Ser No. 288.207, Sept. ll, l972,

[111 3,867,018 [45] Feb. 18, 1975 [5 6] References Cited UNITED STATES PATENTS 3,638,996 2/l972 Klein 350/l75 E X Primary ExaminerJohn K. Corbin Attorney, Agent, or FirmAlan H. Spencer; William C. Nealon; H. R. Berkenstock,Jr.

[5 7] ABSTRACT This invention relates to a microscope eyepiece having a magnification of substantially 10X, an apparent field of view of substantially 52.3", and a maximum exit pupil diameter of substantially 1.60 millimeters.

3 Claims, 1 Drawing Figure I M R9 PLANE (DIAPHRAGM) St "QEJ RI EYEPIECE FOCAL TELESCOPE Foam. PLANE (o) PAIENTEB 8'97?) 3.867. 018

R10 H }E R9 by Q }m R5 TELESCOPE FOCAL s z PLANE 0) EYEP/ECE FOCHL PLANE (DIAPHRAGM) 1 FIVE COMPONENT MICROSCOPE EYEPIECE This is a continuation of application Ser. No. 288,207 filed Sept. ll, 1972 now abandoned.

BACKGROUND OF THE INVENTION The Petzval radius of 5.4F for this eyepiece providing excellent image quality over the entire field of view. The eye-relief provided is 0.74F; which is adequate for comfortable viewing with or without eyeglasses.

DRAWING The drawing is an optical diagram of a microscope eyepiece according to the present invention.

DESCRIPTION The parameters of the lens elements which make up the objective are listed in the following table in which ND is the refractive index for the D line of sodium and y is the Abbe number. Radii (R), thicknesses (T), and spacings (S) are expressed in millimeters and a negative sign indicates lens radii on centers of curvature on the object side of the lens.

Radius Thickness Space Refractive Ahbe R T 5 Index Number ND y SO= l.l543F R] PLANO Tl= 0.1592F NDl= 1.69680 y l=56.l5 R2 2.4S48F Sl= 0.7339F S2= 0.3000F R3 l .0433F T2= 0.0796F ND2= l.78472 -y 2 25.76 R4 l.0433F S3= 0.l75lF R5 l.3295F T3= 0.2220F ND3= 1.73350 y 3=5l.65 R6 ().8693F S4= 0.0047F R7 3.2270F T4= 0.3075F ND4= 1.73350 7 4=5 l .65 R8 .Ol34F SS= (HKMOF R9 (LXNUF T5= (1.325XF ND5= L696Xll 7 5 56.15 Rl(l= l.4776F T6== (LlOOSF ND6= l.7X472 7 6 25.76 Rl l= l.4270F 2. well corrected for the pupil aberrations, especially pupil color and spherical aberration when used in conjunction with a telescope objective and associated prisms as part of an afocal viewing system in an infinity corrected microscope.

The foregoing parameters of radius, thickness, and spacings are functions of the equivalent focal length F of the objective. The value of F as an example is 25.122 millimeters. In this focal length, the absolute values of the foregoing data is as follows:

F 25.122 MAGNIFICATION 10X Radius Thickness Space Refractive Abbe R T S Index Number ND y SO= 29.(l(l() R1 PLANO 'l'l'- 4.001) NDl= L696) y l -5(\.|5 R2 -hl.67ll

5] H4437 S2 7 535 R3 -2bll0 T2 2.000 NDl= I.78472 7 2 25.76 R4 26.210

T3= 5.576 ND3= l.73350 y 3=5l.65 R6 2l.84

T4= 7.725 ND4= l.73350 y -$=5l.65 R8 Z5.46

T5= K135 ND5= Lb hlltl y 5=5(1.l5 Rll)-- ,l7.l2

To 2.524 NDh= [.724472 y (1 25.76 RI l 1 35.85

[n the foregoing tables, negative signs represent concave radii going from left to right.

Having thus described the invention in detail and with sufficient particularity to enable those skilled in cave positive lens I; a double concave singlet ll; a meniscus shaped negative singlet III; a double convex singlet IV; and a convex concavo positive doublet V.

2. The microscope eyepiece of claim I in which the the art to practice it, what 15 desired to have protected parameters fl dii (R) hi k (T) and sPacby Letters Patent is set forth in the following claims. ings (S) are expressed in millimeters and a negative What IS Claimed I51 sign indicates lens radii on centers of curvature on the 1. A five component microscope eyepiece having a object side of the lens MAGNlFlCATlON x Radius Thickness Space Refractive Abbe R T S Index Number s0= i i543F R1 PLANO Tl= 0.1592F NDl= L69680 y l=56.l5 R2 2.4548F Sl= 0.7339F s2= 0.3000F R3 -l.0433F T2= 0.0796F ND2= 1.78472 y 2=25.76 R4 1.0433F s3= 0.l75lF R5 l.3295F T3: 0.2220F ND3= L733S0 y 3=5l.65 R6 0.8693F s4= 0.0047F R7 3.2270F T4= 0.3075F ND4= 1.73350 7 4=5l.65 R8 l.0l34F s5= 0.004OF R9= 0.8693F T5= 0.3258F ND5= l.69680 y S=56.l5 Rl()=' -l.4776F T6= 0.1005F ND6= 1.7mm 'y h=25.76 Rl l= L4270F magnification ofsuhstantially lOX consisting of the following components in optical alignment: A plano con- 3. The microscope eyepiece of claim 2 in which F 25.122. 

1. A five component microscope eyepiece having a magnification of substantially 10X consisting of the following components in optical alignment: A plano concave positive lens I; a double concave singlet II; a meniscus shaped negative singlet III; a double convex singlet IV; and a convex concavo positive doublet V.
 2. The microscope eyepiece of claim 1 in which the parameters of lens radii (R), thicknesses (T), and spacings (S) are expressed in millimeters and a negative sign indicates lens radii on centers of curvature on the object side of the lens
 3. The microscope eyepiece of claim 2 in which F 25.122. 